The error you're encountering with the Godot 4.3 web runtime, specifically the missing EXPORTED_FUNCTIONS _free, suggests that the export template might not have been built with all the necessary functions for your project. This can happen if the export template does not include certain functions that your project relies on. Since you are using the official Spine templates, it might be worth checking if the version of the Spine runtime and the Godot export template you are using are compatible with each other.
Ensure that you are using the latest versions of both the Spine runtime and the Godot export templates. If the problem persists, you might need to build the export templates yourself to ensure all necessary functions are included. You can follow the instructions provided in the spine-godot Runtime Documentation for compiling the Godot editor and export templates from source, which allows you to customize the build process to include any missing functions.
